Welcome to collectibles section. You've come to the right place. Sweeping would definitely be the most convenient considering you don't have to leave the house. Here is a great thread from Krogoth that pretty much covers everything...
https://bitcointalk.org/index.php?topic=5303860.msg55941150#msg55941150If you decide to sell via auction you can find info on how to do so here...
https://bitcointalk.org/index.php?topic=5277761.0When bitcoin is $1 million dollars where are people going to sell their coins in order to get liquidity? I do not think most people would be comfortable peeling $1 million dollar coins, especially if they have not done it before. Obviously this is just my opinion and I could be completely wrong.
Think we going to see more of these after all. Bullish on 4K.com (you can always reach out to them or Scarce.city for Auction)
Got any pics?